Maureen Walsh is a soccer mom who was buying drugs from Todd Harper and Jasper Barron. She saw them at the meeting place rummaging through the belongings of a comatose rape and assault victim, Ariel Randolph, before the duo fled, leading to Maureen calling the police.
She tried to hide the reason she was there, but relented and gave up the truth. She was kept from her yoga class to assist in tracking the two, but neither of the boys killed Ariel. It's unknown what happened to Maureen. (SVU: "Brief Interlude")